This document lists the parameters for
      various types of
      ChromeOS Devices activity events. You can retrieve these events by
      calling CustomerUsageReports.get()
      with parameters=cros:PARAMETER.
    
| Name | Type | Description | 
|---|---|---|
| num_30day_active_devices | integer | The number of 30 day active Chrome OS devices. | 
| num_7day_active_devices | integer | The number of 7 day active Chrome OS devices. | 
| num_beta_channel_devices | integer | The number of Chrome OS devices enrolled in the beta release channel. | 
| num_dev_boot_devices | integer | The number of Chrome OS devices booting in dev mode. | 
| num_dev_channel_devices | integer | The number of Chrome OS devices enrolled in the dev release channel. | 
| num_other_channel_devices | integer | The number of Chrome OS devices not enrolled in a standard release channel. | 
| num_stable_channel_devices | integer | The number of Chrome OS devices enrolled in the stable release channel. | 
| num_unreported_boot_devices | integer | The number of Chrome OS devices that haven't recently reported their boot mode. | 
| num_unreported_channel_devices | integer | The number of Chrome OS devices that haven't recently reported their release channel. | 
| num_verified_boot_devices | integer | The number of Chrome OS devices booting in verified mode. |